Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

Our product and our sum always give the same answer. Who are we?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

I have branches, but no fruit, trunk or leaves. What am I?

The more you take me, the more you leave me behind.
Who Am I?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?